(____) 1. A.coat B.dress C. two
(____) 2. A. are B. is C. he
(____) 3. A.big B. party C. long
(____) 4. A.whose B.what C. they
(____) 5. A.trousers B. skirt C. gloves
____Cr2O 72− +____Cl﹣+____H+=____Cl2↑+____Cr3++____□,下列有关叙述不正确的是( )
已知直线y=x2与双曲线x2a2﹣y2b2=1(a>0,b>0)交于两点,则该双曲线的离心率的取值范围是____
1.3扩大到它的( )倍是130,2.8缩小到它的 是0.028.